CA2436670A1 - Hydraulic turbine with interblade vortex suppressor - Google Patents
Hydraulic turbine with interblade vortex suppressor Download PDFInfo
- Publication number
- CA2436670A1 CA2436670A1 CA002436670A CA2436670A CA2436670A1 CA 2436670 A1 CA2436670 A1 CA 2436670A1 CA 002436670 A CA002436670 A CA 002436670A CA 2436670 A CA2436670 A CA 2436670A CA 2436670 A1 CA2436670 A1 CA 2436670A1
- Authority
- CA
- Canada
- Prior art keywords
- blade
- blades
- turbine runner
- array
- crown
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B3/00—Machines or engines of reaction type; Parts or details peculiar thereto
- F03B3/12—Blades; Blade-carrying rotors
- F03B3/125—Rotors for radial flow at high-pressure side and axial flow at low-pressure side, e.g. for Francis-type turbines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
- F03B11/04—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator for diminishing cavitation or vibration, e.g. balancing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Abstract
An improved Francis-type turbine runner. To extend operating range to partial load, inter blade fins partially extend into the flow paths between the runner blades. The inter blade fins correspond in shape and pattern with the shape and pattern of that portion of the runner blades with which the fins coextend along the flow paths between blades. The fins are recessed rearwardly of the flow dividing edges of the runner blades in the flow paths between the runner blades and reduce occurrence of inter blade vortices during partial or low load operating conditions. The shape of the interblade fins is further improved by tilting or sloping the tip of the interblade fin towards the suction surface of the adjacent blade. This creates a small convergence in the flow path between the fin and the suction surface of the blade.
Claims (16)
1. A Francis-type hydraulic turbine runner rotatable about an axis of rotation, said turbine runner comprising:
a crown forming the upper axial end thereof when the axis of rotation is substantially vertical;
a band concentric with the crown on the axis of rotation, the band and crown forming a water inlet end and the runner terminating at its lower end in a water outlet end;
an array of blades extending between the band and the crown, each of the blades in the array having a suction face and a pressure face trailing the suction face in the direction of rotation defining flow paths between adjacent blades in the array that extend from the water inlet end to the water outlet end; and, a plurality of inter blade fins suspended from the crown of the turbine runner and extending partially into the flow paths between each of the blades wherein at least one inter blade fin is positioned between each pair of adjacent blades in the array of blades and coextends along the flow path with a pressure surface portion of the pressure face of a first blade of the pair of blades and with a suction surface portion of the suction face of a second blade of the pair of adjacent blades.
a crown forming the upper axial end thereof when the axis of rotation is substantially vertical;
a band concentric with the crown on the axis of rotation, the band and crown forming a water inlet end and the runner terminating at its lower end in a water outlet end;
an array of blades extending between the band and the crown, each of the blades in the array having a suction face and a pressure face trailing the suction face in the direction of rotation defining flow paths between adjacent blades in the array that extend from the water inlet end to the water outlet end; and, a plurality of inter blade fins suspended from the crown of the turbine runner and extending partially into the flow paths between each of the blades wherein at least one inter blade fin is positioned between each pair of adjacent blades in the array of blades and coextends along the flow path with a pressure surface portion of the pressure face of a first blade of the pair of blades and with a suction surface portion of the suction face of a second blade of the pair of adjacent blades.
2. The turbine runner of claim 1 wherein the interblade fins is has a tip portion tilted towards the suction surface of the second blade to converge the flow path between the inter blade fin and the suction surface of the second blade.
3. The turbine runner of claim 1 wherein the at least one inter blade fin is positioned equi-distant from the first and second blade of the pair of adjacent blades along the crown of the runner.
4. The turbine runner of claim 1 wherein the suction and pressure faces of each blade of the array of blades meets between the band and the crown at an outer periphery defining a flow dividing edge and wherein the at least one inter blade fin has a leading edge positioned in the flow path rearwardly of the flow dividing edges of the first and second blades of the pair of adjacent blades.
5. The turbine runner of claim 1 wherein the at least one inter blade fin has a fin suction surface whose pattern corresponds in shape to the suction surface portion of the second blade and has a fin pressure surface portion whose pattern corresponds in shape to the pressure surface portion of the first blade.
6. The turbine runner of claim 1 wherein each blade in the array of blades has an x shaped configuration when viewing the blade radially inward of the turbine runner from the flow dividing edge of each blade, and the inter blade fins between the array of blades each has a shape and pattern similar to the shape and pattern of the array of blades for that portion of the array of blades that the inter blade fins coextend with through the flow paths.
7. The turbine runner of claim 1 wherein each of the blade fins is located in the flow path between each of the blades about one third of the distance along the flow path from the water inlet end of the turbine runner.
8. The turbine runner of claim 4 wherein each of the blade fins extends from the crown into the flow path for about one third of the distance to the water outlet end.
9. A Francis-type hydraulic turbine runner rotatable about an axis of rotation, said turbine runner comprising:
a crown forming the upper axial end thereof when the axis of rotation is substantially vertical;
a band concentric with the crown on the axis of rotation, the band and crown forming a water inlet end and the runner terminating at its lower end in a water outlet end;
an array of blades extending between the band and the crown, each of the blades in the array having a suction face and a pressure face trailing the suction face in the direction of rotation, the suction and pressure faces meeting between the band and the crown at an outer periphery defining a flow dividing edge for each of the blades, the suction and pressure faces providing substantially smooth streamlined surface to define flow paths between adjacent blades in the array that extend from the water inlet end to the water outlet end; and, a plurality of inter blade fins suspended from the crown of the turbine runner and extending partially into the flow paths between each of the blades for suppressing interblade vortices wherein at least one inter blade fin is positioned between each pair of adjacent blades in the array of blades and coextends along the flow path with a pressure surface portion of the pressure face of a first blade of the pair of blades and with a suction surface portion of the suction face of a second blade of the pair of adjacent blades.
a crown forming the upper axial end thereof when the axis of rotation is substantially vertical;
a band concentric with the crown on the axis of rotation, the band and crown forming a water inlet end and the runner terminating at its lower end in a water outlet end;
an array of blades extending between the band and the crown, each of the blades in the array having a suction face and a pressure face trailing the suction face in the direction of rotation, the suction and pressure faces meeting between the band and the crown at an outer periphery defining a flow dividing edge for each of the blades, the suction and pressure faces providing substantially smooth streamlined surface to define flow paths between adjacent blades in the array that extend from the water inlet end to the water outlet end; and, a plurality of inter blade fins suspended from the crown of the turbine runner and extending partially into the flow paths between each of the blades for suppressing interblade vortices wherein at least one inter blade fin is positioned between each pair of adjacent blades in the array of blades and coextends along the flow path with a pressure surface portion of the pressure face of a first blade of the pair of blades and with a suction surface portion of the suction face of a second blade of the pair of adjacent blades.
10. The turbine runner of claim 9 wherein the interblade fins is has a tip portion tilted towards the suction surface of tile second blade to converge the flow path between the inter blade fin and the suction surface of the second blade.
11. The turbine runner of claim 9 wherein the at least one inter blade fin is positioned equi-distant from the first and second blade of the pair of adjacent blades along the crown of the runner.
12. The turbine runner of claim 11 wherein the at least one inter blade fin has a leading edge positioned in the flow path rearwardly of the flow dividing edges of the first and second blades of the pair of adjacent blades.
13. The turbine runner of claim 12 wherein the at least one inter blade fin has a fin suction surface whose pattern corresponds in shape to the suction surface portion of the second blade and has a fin pressure surface portion whose pattern corresponds in shape to the pressure surface portion of the first blade.
14. The turbine runner of claim 9 wherein each blade in the array of blades has an x shaped configuration when viewing the blade radially inward of the turbine runner from the flow dividing edge of each blade, and the inter blade fins between the array of blades each has a shape and pattern similar to the shape and pattern of the array of blades for that portion of the array of blades that the inter blade fins coextend with through the flow paths.
15. The turbine runner of claim 9 wherein each of the blade fins is located in the flow path between each of the blades about one third of the distance along the flow path from the water inlet end of the turbine runner.
16. The turbine runner of claim 12 wherein each of the blade fins extends from the crown into the flow path for about one third of the distance to the water outlet end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2436670A CA2436670C (en) | 2003-08-07 | 2003-08-07 | Hydraulic turbine with interblade vortex suppressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2436670A CA2436670C (en) | 2003-08-07 | 2003-08-07 | Hydraulic turbine with interblade vortex suppressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2436670A1 true CA2436670A1 (en) | 2005-02-07 |
| CA2436670C CA2436670C (en) | 2011-05-10 |
Family
ID=34120694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2436670A Expired - Fee Related CA2436670C (en) | 2003-08-07 | 2003-08-07 | Hydraulic turbine with interblade vortex suppressor |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2436670C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536591A (en) * | 2012-02-07 | 2012-07-04 | 戴会超 | Mixed-flow type water turbine for increasing survival rate of fishes |
| EP2873851A1 (en) * | 2013-11-14 | 2015-05-20 | ALSTOM Renewable Technologies | Aerating system for hydraulic turbine |
| EP3480451A1 (en) * | 2017-11-03 | 2019-05-08 | AquaZoom AG | Small hydroelectric power station |
-
2003
- 2003-08-07 CA CA2436670A patent/CA2436670C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536591A (en) * | 2012-02-07 | 2012-07-04 | 戴会超 | Mixed-flow type water turbine for increasing survival rate of fishes |
| CN102536591B (en) * | 2012-02-07 | 2014-04-16 | 戴会超 | Mixed-flow type water turbine for increasing survival rate of fishes |
| EP2873851A1 (en) * | 2013-11-14 | 2015-05-20 | ALSTOM Renewable Technologies | Aerating system for hydraulic turbine |
| WO2015071094A1 (en) * | 2013-11-14 | 2015-05-21 | Alstom Renewable Technologies | Aerating system for hydraulic turbine |
| RU2666211C1 (en) * | 2013-11-14 | 2018-09-06 | ДжиИ Риньюэбл Текнолоджиз | Aeration system for hydraulic turbine |
| US10215151B2 (en) | 2013-11-14 | 2019-02-26 | Ge Renewable Technologies | Aerating system for hydraulic turbine |
| EP3480451A1 (en) * | 2017-11-03 | 2019-05-08 | AquaZoom AG | Small hydroelectric power station |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2436670C (en) | 2011-05-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20150807 |